CN103059879A - Control method for middle position of coking coal stroke of hydraulic pressure exchanger - Google Patents
Control method for middle position of coking coal stroke of hydraulic pressure exchanger Download PDFInfo
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- CN103059879A CN103059879A CN2012103945263A CN201210394526A CN103059879A CN 103059879 A CN103059879 A CN 103059879A CN 2012103945263 A CN2012103945263 A CN 2012103945263A CN 201210394526 A CN201210394526 A CN 201210394526A CN 103059879 A CN103059879 A CN 103059879A
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Abstract
The invention discloses a control method for the middle position of a coking coal stroke of a hydraulic pressure exchanger. A waste gas exchange operation is carried out by taking the middle position of the oil cylinder stroke as an oil cylinder action control point, and the operation time and process control of multiple oil cylinders are implemented by a proximity switch controlled by a PLC (Programmable Logic Controller) system. When being used for realizing the automatic operation of the PLC system, the control method is favorable to the reduction of fault rates of the system, and can be used for enhancing the stroke precision of the oil cylinder and the operation security, thus ensuring equipment security of a gas exchanger.
Description
Technical field
The present invention relates to a kind of control method of gas switch, particularly a kind of control method of hydraulic switch coking coal stroke interposition.
Background technology
Gas switch is the nucleus equipment in the coke oven heat power engineering system, the exchange of the coal gas when mainly realizing the coke oven heating, air, waste gas.Hydrostatic transmission is adopted in its work, belongs to conventional hydraulic technique, does not repeat them here, see accompanying drawing 1, its exchange process is: when these three steps of Gas shutoff → waste gas exchange → turn on the gas, coke oven adopt the coke-oven gas heating, be generally every interval and looped exchange in 30 minutes.The topmost requirement of exchange board is that stroke is accurate, and action is clearly demarcated, and work is strong.The hidden danger of exchange board when work maximum is exchange sequence entanglement and lead to great security incident (such as blast, burning etc.), and present coking industry generally uses hydraulic switch to carry out the exchanging operation of coal gas along with the development of mechanize large capacity coke oven.Its topworks adopts hydraulic ram to control, in coke-oven gas when heating, adopt a hydraulic ram to realize that (working hour is 15 seconds) → interposition about 0.8 second (waste gas exchange process) → coking coal exchange rotary plug valve that pauses of cutting out of two groups of coking coal exchange rotary plug valves opens such working cycle.The method that present coking coal oil cylinder stroke (comprising the interposition pause) is taked usually is electric limiting, magnetic approach switch control.These methods solve the control problem that the stroke interposition of oil cylinder is paused to a certain extent, and still, in case electric limiting breaks down or magnetic approach switch is interfered, the mishandle that this will cause topworks-oil cylinder has influence on the normal heating of coke oven.
Carried out relevant improvement for this difficult problem, retrieve in correlation technique: one, " coke oven gas switch lock zero protection system " patent No. 201020297540.8, this utility model discloses anti-lock zero securing system of a kind of coke oven gas exchanger, the rly. that comprises main path switch and five parallel connections, comprise that also forward exchange in parallel with described rly. respectively is for electric contactor, back exchange also comprises the forward alteration switch for electric contactor and protection contactor, the back exchange switch, the lock zero-bit is carried out switch, protection switch, forward zero-bit medullary ray approach switch and reverse zero-bit medullary ray approach switch; This coke oven gas switch lock zero protection system consists of reliable zero locking circuit system by a plurality of rly.s and contactor, can not cause dislocation, misorientation, can not cause gas explosion, gas leak, cylinder to draw the generation of the serious accidents such as bad.Two, " the explosion-proof Anti-dislocation securing system of coke oven gas exchanger " patent No. 200920276841.X; this utility model discloses the explosion-proof Anti-dislocation securing system of a kind of coke oven gas exchanger; comprise programmable logic controller and coupled coal gas cylinder forward operation zero-bit system, coal gas cylinder inverted running zero-bit system; coal gas cylinder forward operation zero-bit system comprises the limit switch that is positioned at locomotive forward parking stall; coal gas cylinder inverted running zero-bit system comprises the limit switch that is positioned at reverse parking stall, has two at least at the limit switch of same position.The explosion-proof Anti-dislocation securing system of this coke oven gas exchanger; on each locomotive parking stall at least two limit switches are housed all; no matter be under running status; in the waiting status; no matter forward and reverse any limit signal goes wrong; all reliable and secure provide protection is played at any time auto stop and warning.More than two common characteristics of patented technology be to adopt two spacing and interlock protections, but be subject to on-the-spot severe environment restriction, limit switch fault appears and spacing position is unpunctual, just lack effective countermeasure.
Summary of the invention
For addressing the above problem, the invention discloses a kind of control method of hydraulic switch coking coal stroke interposition, realized automatization control, improved the accurate degree of stroke in the operation, improved the working efficiency of exchange board, also improved simultaneously the security of producing.
The control method of hydraulic switch coking coal stroke interposition disclosed by the invention, comprise the steps: 1, take the coking coal working hydraulic pressure oil cylinder design runlength of exchange board as s, determine first the interposition of the coking coal working hydraulic pressure oil cylinder stroke of exchange board, i.e. the coking coal working hydraulic pressure oil cylinder work of exchange board is coking coal cock stroke complete shut-down position to the s/2 place; 2, utilize the coking coal working hydraulic pressure oil cylinder speed of exchange board and the timing relationship of stroke: speed v=stroke S/ time t, after velocity amplitude v determined, the speed the when forward of the coking coal working hydraulic pressure oil cylinder by hydraulic throttle valve regulation exchange board, back exchange was v; 3, the coking coal working hydraulic pressure oil cylinder interposition at exchange board arranges approach switch, the setup times protection is namely arrived the t of process stipulation swap time after second in the coking coal working hydraulic pressure oil cylinder first half term of exchange board in the PLC system, approach switch does not have the approach signal feedback, then system sends warning, and exchange board suspends exchange; 4, after the trouble shooting, start resetting device, can continue automatic exchange after the warning that resets.The control method of hydraulic switch coking coal stroke interposition disclosed by the invention, carry out the waste gas swap operation take the oil cylinder stroke interposition as the cylinder action reference mark, utilize simultaneously the approach switch Multi-cylinder implementation and operation time course control of PLC system control, when having realized the system automation operation, improved spacing accuracy, equipment operation and the difficulty of controlling have been reduced, the running precision that also helps raising equipment reduces the failure rate of system, improved the control accuracy of oil cylinder stroke, improve the security of operation, and then ensured the device security of gas switch.
A kind of improvement of the control method of hydraulic switch coking coal stroke interposition disclosed by the invention, the coking coal working hydraulic pressure oil cylinder of described exchange board is provided with speed-regulating valve, described speed-regulating valve is connected to the fueller of hydraulic ram, and coking coal working hydraulic pressure oil cylinder, approach switch and the resetting device of described speed-regulating valve, exchange board all are connected with the PLC system.This improvement has guaranteed the stability of oil cylinder working speed effectively by the speed-regulating valve of setting, is conducive to reduce the failure rate of equipment, has improved security and the production efficiency of equipment.
The control method of hydraulic switch coking coal stroke interposition disclosed by the invention, control the precision height, the oil cylinder stroke control accuracy is high, has effectively improved stability and the safety coefficient of equipment operation, ensure continuity and the production safety of producing, improved production efficiency.
Description of drawings
Fig. 1, hydraulic schematic diagram of the present invention;
The control flow chart of the control method of Fig. 2, hydraulic switch coking coal stroke interposition disclosed by the invention;
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand following embodiment and only be used for explanation the present invention and be not used in and limit the scope of the invention.
As depicted in figs. 1 and 2, the control method of hydraulic switch coking coal stroke interposition disclosed by the invention, comprise the steps: 1, take the coking coal working hydraulic pressure oil cylinder design runlength of exchange board as s, determine first the interposition of the coking coal working hydraulic pressure oil cylinder stroke of exchange board, i.e. the coking coal working hydraulic pressure oil cylinder work of exchange board is coking coal cock stroke complete shut-down position to the s/2 place; 2, utilize the coking coal working hydraulic pressure oil cylinder speed of exchange board and the timing relationship of stroke: speed v=stroke S/ time t, after velocity amplitude v determined, the speed the when forward of the coking coal working hydraulic pressure oil cylinder by hydraulic throttle valve regulation exchange board, back exchange was v; 3, the coking coal working hydraulic pressure oil cylinder interposition at exchange board arranges approach switch, the setup times protection is namely arrived the t of process stipulation swap time after second in the coking coal working hydraulic pressure oil cylinder first half term of exchange board in the PLC system, approach switch does not have the approach signal feedback, then system sends warning, and exchange board suspends exchange; 4, after the trouble shooting, start resetting device, can continue automatic exchange after the warning that resets.The control method of hydraulic switch coking coal stroke interposition disclosed by the invention, carry out the waste gas swap operation take the oil cylinder stroke interposition as the cylinder action reference mark, utilize simultaneously the approach switch Multi-cylinder implementation and operation time course control of PLC system control, when having realized the system automation operation, improved spacing accuracy, equipment operation and the difficulty of controlling have been reduced, the running precision that also helps raising equipment reduces the failure rate of system, improved the control accuracy of oil cylinder stroke, improve the security of operation, and then ensured the device security of gas switch.
As a kind of preferred, the coking coal working hydraulic pressure oil cylinder of described exchange board is provided with speed-regulating valve, described speed-regulating valve is connected to the fueller of hydraulic ram, and coking coal working hydraulic pressure oil cylinder, approach switch and the resetting device of described speed-regulating valve, exchange board all are connected with the PLC system.By the speed-regulating valve that arranges, effectively guaranteed the stability of oil cylinder working speed, be conducive to reduce the failure rate of equipment, improved security and the production efficiency of equipment.
Specific embodiment
1, take the coking coal working hydraulic pressure oil cylinder of certain exchange board as its design runlength of example as 460mm, measure first the interposition of oil cylinder stroke, be that oil cylinder work to 230mm place is coking coal cock stroke complete shut-down position, namely with this position as the condition that can carry out waste gas exchange.2, utilize timing relationship (speed v=stroke S/ time t=230mm/15 second=15.33mm/s) of coking coal working hydraulic pressure oil cylinder speed and stroke, after velocity amplitude is determined, speed when the forward by hydraulic throttle valve regulation coking coal oil cylinder, back exchange is 15.33mm/s, ensures that the working hour of coking coal oil cylinder half way was about for 15 seconds.Consider that oil cylinder load and oil liquid temperature variation meeting exert an influence to the oil cylinder working speed, so adopt speed-regulating valve control (this is the further improvement to system) in the hydraulic efficiency system, the hydraulic efficiency system rated pressure is set to safe pressure (about 6MPa), even guarantee also can not draw when load is excessive in the exchange system topworks such as bad waste gas.3, in computer or PLC system; when approach switch is normally adopted in the control of coking coal working hydraulic pressure oil cylinder interposition as the exchange of realizing middle limiting control coal gas in the pause of interposition; in Controlling System, be provided with simultaneously guardtime namely in coking coal oil cylinder first half term after swap time to 15 seconds of process stipulation; the realizing middle limiting of coking coal working hydraulic pressure oil cylinder is not still not then; system will automatic alarm, and exchange board suspends exchange.This has just guaranteed coke oven when waste gas does not exchange, and the coke-oven gas cock can reverse opening (it is closing condition that the coking coal stopcock has a segment limit in the centre), guarantees the safety of coke oven heat power engineering system.4, the reset button of setup times protection, make operator confirm trouble free after, reset and can continue automatic exchange after reporting to the police.Be convenient to fault cause find out or get rid of after can come into operation fast, ensure the direct motion of coke oven.
After the method for this time limitation is adopted in the control of hydraulic switch coking coal stroke interposition, in the use procedure, truly have the approach switch failure condition, when at this moment coking coal exchanges to the mid-travel position, system alarm stops exchanging operation automatically, and pending fault is processed the safety that has guaranteed the coke oven heating.Owing to adopted the control of swap time, in case in the work, oil cylinder work is overtime, it is too large just to show that also load resistance appears in system, or the excessively low medium viscosity that causes of oil liquid temperature increases so that faults such as back pressure increases, this takes necessary intervening measure also so that the exchange board operator in time understand the work state information of exchange board, ensures the work safety of gas switch.In addition, what this control method was revised is sequence of control, need not to increase facility, and improvement cost does not almost have.More original technology compare improve aspect the control reliability larger.Ensured the work safety of gas switch.
The control method of hydraulic switch coking coal stroke interposition disclosed by the invention, control the precision height, the oil cylinder stroke control accuracy is high, has effectively improved stability and the safety coefficient of equipment operation, ensure continuity and the production safety of producing, improved production efficiency.
The disclosed technique means of the present invention program is not limited only to the disclosed technique means of above-mentioned technique means, also comprises the technical scheme that is comprised of above technical characterictic arbitrary combination.The above is the specific embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (2)
1. the control method of a hydraulic switch coking coal stroke interposition, it is characterized in that: the control method of described hydraulic switch coking coal stroke interposition comprises the steps: 1, take the coking coal working hydraulic pressure oil cylinder design runlength of exchange board as s, determine first the interposition of the coking coal working hydraulic pressure oil cylinder stroke of exchange board, i.e. the coking coal working hydraulic pressure oil cylinder work of exchange board is coking coal cock stroke complete shut-down position to the s/2 place; 2, utilize the coking coal working hydraulic pressure oil cylinder speed of exchange board and the timing relationship of stroke: speed v=stroke S/ time t, after velocity amplitude v determined, the speed the when forward of the coking coal working hydraulic pressure oil cylinder by hydraulic throttle valve regulation exchange board, back exchange was v; 3, the coking coal working hydraulic pressure oil cylinder interposition at exchange board arranges approach switch, the setup times protection is namely arrived the t of process stipulation swap time after second in the coking coal working hydraulic pressure oil cylinder first half term of exchange board in the PLC system, approach switch does not have the approach signal feedback, then system sends warning, and exchange board suspends exchange; 4, after the trouble shooting, start resetting device, can continue automatic exchange after the warning that resets.
2. the control method of hydraulic switch coking coal stroke interposition according to claim 1, it is characterized in that: the coking coal working hydraulic pressure oil cylinder of described exchange board is provided with speed-regulating valve, described speed-regulating valve is connected to the fueller of hydraulic ram, and coking coal working hydraulic pressure oil cylinder, approach switch and the resetting device of described speed-regulating valve, exchange board all are connected with the PLC system.
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| CN2012103945263A CN103059879A (en) | 2012-10-17 | 2012-10-17 | Control method for middle position of coking coal stroke of hydraulic pressure exchanger |
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| CN2012103945263A CN103059879A (en) | 2012-10-17 | 2012-10-17 | Control method for middle position of coking coal stroke of hydraulic pressure exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104710992A (en) * | 2015-03-26 | 2015-06-17 | 山东钢铁股份有限公司 | Cokery stroke switching control device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102287418A (en) * | 2011-06-24 | 2011-12-21 | 北京首钢国际工程技术有限公司 | Hydraulic cylinder control device capable of realizing accurate half-way stoppage |
| CN102453487A (en) * | 2010-10-19 | 2012-05-16 | 大连华宇冶金设备有限公司 | Gas exchange controlling device |
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2012
- 2012-10-17 CN CN2012103945263A patent/CN103059879A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453487A (en) * | 2010-10-19 | 2012-05-16 | 大连华宇冶金设备有限公司 | Gas exchange controlling device |
| CN102287418A (en) * | 2011-06-24 | 2011-12-21 | 北京首钢国际工程技术有限公司 | Hydraulic cylinder control device capable of realizing accurate half-way stoppage |
Non-Patent Citations (2)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104710992A (en) * | 2015-03-26 | 2015-06-17 | 山东钢铁股份有限公司 | Cokery stroke switching control device |
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Application publication date: 20130424 |